Yes, a family can often keep a brain-dead person on life support for a period, especially for organ donation or to allow time for grieving and saying goodbye, but brain death is legal death, meaning the body won't survive long without machines, and the support is eventually withdrawn, though laws and hospital policies vary, sometimes leading to family-doctor conflicts.
The body of a brain-dead person is usually not supported for very long, Greene-Chandos said. Doctors sometimes provide support (in the form of a ventilator, hormones, fluids, etc.) for several days if the organs will be used for donation, or if the family needs more time to say good-bye, Greene-Chandos said.
The eyes don't move when the head is moved (oculocephalic reflex). The eyes don't move when ice water is poured into the ear (oculo-vestibular reflex). There is no gagging reflex when the back of the throat is touched. The person doesn't breathe when the ventilator is switched off.
Studies suggest that brain activity may continue several minutes after a person has been declared dead. Still, brain activity isn't the same as consciousness or awareness. It doesn't mean that a person is aware that they've died.
While there is ongoing debate about the need for consent for brain death testing, American Academy of Neurology guidelines state there is “no obligation to obtain consent”. However, familial objection to brain death testing can present care teams with unique challenges.
Brain death is legal death
It can be confusing to be told someone has brain death, because their life support machine will keep their heart beating and their chest will still rise and fall with every breath from the ventilator. But they will not ever regain consciousness or start breathing on their own again.
Your brainstem manages your breathing and heart rate. Your brain manages senses like sight, sound and touch, and abilities like motor movement. Because people's brains drive these essential functions, someone is legally dead when they're diagnosed with brain death.
Several years ago, the autopsy report of a totally brain-dead patient named TK who was kept on life support for nearly twenty years was published in the Journal of Child Neurology. He remains the individual kept on life support the longest after suffering total brain failure.
The brain and nerve cells require a constant supply of oxygen and will die within a few minutes, once you stop breathing. The next to go will be the heart, followed by the liver, then the kidneys and pancreas, which can last for about an hour. Skin, tendons, heart valves and corneas will still be alive after a day.
Brain death is permanent and irreversible. It is a legal definition of death. However, the vital organs such as the heart, lungs, liver, pancreas and kidneys can be kept viable for a few days if supported by artificial or mechanical support.
There is no rule about how long a person can stay on life support. People getting life support may continue to use it until they either recover or their condition worsens. In some cases, it's possible to recover after days or weeks of life support, and the person can stop the treatments.
In plain terms, current diagnostic methods yield false positive results — physicians declare patients dead who are not in fact dead. In these cases, it is more accurate to diagnose that the patient suffered a profound brain injury rather than total loss of all neurological functioning.
They may still be able to hear you and hearing your voice could be very reassuring to them. They may be confused about where they are or what is happening, so it's helpful to tell them they are in hospital and that you are with them.
Brain death is a clinical and legal definition of death. 1 A person who is brain dead may still show signs of life such as warm skin, a heartbeat, and a chest that rises and falls with ventilation. Even though a brain-dead person may appear to be alive, the brain is significantly damaged and recovery is impossible.
The time you need mechanical ventilation depends on the reason. It could be hours, days, weeks, or, rarely, months or years. Ideally, you'll only stay on a ventilator for as little time as possible. Your providers will test your ability to breathe unassisted daily or more often.
The diagnosis of brain death is primarily clinical. No other tests are required if the full clinical examination, including each of two assessments of brain stem reflexes and a single apnea test, are conclusively performed.
You shouldn't fear death because it's a natural, inevitable part of life, and accepting its impermanence helps you focus on living fully in the present, find peace by letting go of attachments, or find hope in spiritual beliefs about an afterlife, with philosophies suggesting it's just the end of experience, making the fear itself pointless. Many find liberation in understanding that all things change and by focusing on leaving a positive legacy, as suggested by existentialists.
For the first few minutes of the postmortem period, brain cells may survive. The heart can keep beating without its blood supply. A healthy liver continues breaking down alcohol. And if a technician strikes your thigh above the kneecap, your leg likely kicks, just as it did at your last reflex test with a physician.
The brain is the organ that cannot be donated for transplantation in humans. While multiple solid organs including kidneys, liver, lungs, and heart can be successfully transplanted from deceased donors, the brain itself is never procured or transplanted 1.
Continuing artificial life support for patients who are brain dead may produce harm to patients, families, and others involved. Declaration of brain death should not be delayed to wait for families or to justify hospital care. Instead, appropriate family care should be provided after the death declaration.
However no one can recover from brain death. If the clinician has any doubt as to whether there can be even minimal recovery, brain death is not declared. A determination of brain death means that the patient has died; brain death is irreversible.
Use of a ventilator could slow the process down, but only temporarily. Even with mechanical life support, they claimed, the heart would stop and a body would begin to decompose within a week or two.
When the brain dies, the person cannot move, breathe, think or feel. Pain or suffering cease. Brain death is death, and cannot be reversed. The heart can continue to beat for awhile as the ventilator (breathing machine) provides oxygen to the body.
As long as the ventilator is working, the heart will keep beating. You may see a brain dead patient make movements. These movements are reflexes. They are not because the brain is working.
Once the decision to proceed with the brain death determination has been made, three conditions must be present: coma, the absence of brainstem reflexes, and apnea. Coma should be evaluated by ensuring a lack of responsiveness to noxious stimuli; no eye or motor reflex should be present in response to stimuli.